Gas producer



NOV. 24, 1931. s BENGTSON 833,816

GAS PRODUCER Filed July 24; 1929 2 Sheets-Sheet l Z, 2 121 .3! 6 [I "IIII 4. I

all 4 frefl Leopold Benylison Nov. 24, 1931. v s. BENGTSON 1,333,316

GAS PRODUCER Filed July 24. 1929 2 Sheets-Sheet 2 Jmaavz IVE 7 Leo/old32/923017.

Patented Nov. 24, 1931 umTaofsTATEsf 1 .1"1"a1-1T OFFICE TION COMPANY,OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS 1 1 GASreommnn Application filedlrul 24, 1929. Serial No. 391,462.

The present invention relates to gas pro- ;clucers, and moreparticularly to a means for automatically securing, at regularpredetermined intervals, the discharge of ashes'from the bottom oftheproducer body by a plowing device, which is made operative during aportion of eachrevolution of the producer. Other objects and features ofthe invention are set forth more specifically hereinafter, referencebeing bad to the accompanying drawings, in which Fig. 1 is a verticalsectional view of a roproducer, said shell being here shown as sup;ported in spaced relation to an ash and water sealpan 2 by meansof arms3, 3 that radiate from a hollow support 3" at the'center of said ashpan. Said support 3 registers'with the usual central blast passage 3 ofthe producer, and the arms 3, 3 are made hollow, to receive the blastfrom the central support 3 and to distribute it through theirperforations 3* to the fuel bed but only one perforation is shown. Saidash pan '2 is rotatably supported on a series of rollers 4, t (only onebeing shown) and the drive for said pan, to impart rotation thereto andto the shell 1 supported thereby, is obtained from a bevel pinion 5 on ashaftv 6, said bevel pinion5 meshing with a bevel gear 7 on the bottomof said pan. An annular skirt 8, depending from the shell 1, makes aseal with the water in pan 2 to prevent the escape of gases from thebottom portion of the gas producer, and a similar'water seal at theupper part of the gas producer is formed, as shown at 9, between therotary shell 1 and a depending annular skirt 10 provided by thestationary cover or top 11 of the producer, said top or cover 11 beingsupported in the usual fashion by a plurality of posts or columns 12, ofwhich only oneis shown.

Notwithstanding the unltary connection between shell 1 and pan 2, thisconstruction leaves between these parts anunobstructed spacefortheoperation of an ash plow 13, best shown in Fig. 2, said plow beingjour- LEOZPOLD BENG'rson, or Lennon, ENGLAND, ASSIGNOR To MORGAN.consrrnuc- M nalled at the center ofthe ash pan 2 and being adaptednormally to rotate in unison with said ash pan by its frictionalengagement with the bottom thereof, and by the pressure thereon of thesuperposed rotating mass of ashes, substantially as set forth and 1described in the United States Letters Patent to J efieries No.1,198,087, dated September 12, 1916. In the producer of said Jeiferiespatent, provision is made for manually setting in operation certainmechanism for interposing a stop in the path of the ash plow,

thereby to hold said plow stationary while. 7

the ash pan continues to rotate, and to crowd the ashes againstthecurved'eclge' of the stationary plow; this crowding action forces theashes outwardly toward the circumference of the ash pan and causes themto ride up the inclined surface of the pans rim, for discharge from thepan at that point.

' In the gas producerof the present invention, as distinguished from thegas producer of the aforesaid Jefferies patent, theneed for manualintervention,.to secure the operation ofthe ash plow, is whollyeliminated; instead,

provision is made for automatically procuring the operation of said plowat suitable intervals, so that, once the mechanismis properly adjusted,no further attention, on the part of the operator to the operation ofthe ash plow during a run of the producer, is 50 required. The mechanismfor accomplishing this result will now be described.

Referring to Figs. 2'and'3, the shaft 6 whichcarries the driving pinion5 employed tively slow speed through a train ofreduction; gearing 1 1,from any suitable source of power, and on oneof the countershafts ofthisreduction gearing is mounted an eccenfto rotate thegas producer, isdriven at a relatrio 15. The motion of said eccentric 15is transmittedthrough a. connecting rod 16, so

as to secure oscillation of a bellcrank lever 17, fulcrumed at 18 on asupporting standard 19, and this motion of the bell crank 17 istransmitted by a link 20 to a rocker arm 21 pivoted on a stud 22 thatprojects outwardly from one of the posts or columns 12. -Revolublymounted on said stud 22 is a cam 23, having secured theretoconcentrically a ratchet wheel 24. 'A pawl 25 pivoted to the rocker arm21. is so disposed as to opera ively engage the teeth of rat. het wheel24 when the link 20 draws the rocker arm 21 to the left in Fig. 3,thereby to give the cam 23 a small angular movement in acounterclockwise direction at each revolution of the shaft of eccentric15. A holding pawl 26 prevents retrograde movement of cam 23 on theright hand swing of rocker arm 21, and on thisright hand swing, the pawl25 is dragged over the teeth of ratchet wheel 24 withouteifect. Thegearing and ratchet me'fhanism are so arranged tl at the pan 2 will makeone revolution in slightly less time than the cam 'As best shown inFigs. 1 and 2, the plow 13 near its free end carries an upwardlyinclined portion 27 for scraping action upon the rim of pan 2, and thisportion 27 terminates in a bar 28 which projects over the rim of saidpan. As best shown in Fig. 3, the

0 same post or column 12 which carries the ratchet-operated cam 23, alsoprovides a suitable bearing for a rock-shaft 29, on the inner end ofwill h is carried a latch or hook 30, adjacent the path of'plow-bar 28.An arm 31 on the other end of rock-shaft 29 carries a weight 32, whosetendency isto maintain the latchor hook '30 in lowered position, whereit will intercept the-plow-bar 28. A link 33 connects the ar1n'31 with arockerarm 34-, pivoted at 35 and carrying a roller 36 that rides on theperiphery of cam 23. The operation is as follows V v The constantuniform rotation of pan 2 carries the plow 13 around, and the plow-bar.28 contacts with the depressed latch 3.0 just before the raised portionor projection 37 of cam 23 arrives below the roller 36. In consequence,the plow 13 is held stationary for a short period while the pan 2continues to rotate,this producing a plowing action that crowds theashes outwardly and up the surface of the'blade 27, for discharge overthe rim of pan 2. Such plowing, however, is 'onlv of short duration. foralmost immediate} ly the raised portion 37 of cam 23 arrives beneath theroller 36 and thereby raises the latch 30. This removes the obstructionto until a full revolution of pan 2 has taken place, to bring the plowbar 28 once more into contact with the depressed latch 30; then, asbefore, the plowing period of relatively short duration ensues. In thisway, there is automatically obtained, at each revolution of the ash pan,a short period of ash plowing, the duration of which, manifestly, may bereadily varied and adjusted "to suit the rate of combustion andash-formation within the producer, as for example-by means for vary- Ina gas producer,a fuel shell and an ash pan connected for rotation inunison, means for rotating said parts in the operation of the producer,an ash plowionthe bottom of said pan and normally rotatable with saidpan by the friction and pressureof the contained bed of fuel, a latchsupported independently; of said rotating shell and pan in position toengage said plow and hold it from rotation, thereby to efl'ect removalof ashes from said pan during each engagement of said latch with saidplow, a counterweight operative on said latch to hold it in the path ofsaid plow, a rotary'cam having a projection thereon adapted to raisesaid latch, once in each revolution of said cam, into inoper ativeposition, thereby to release said plow for rotation in unison with saidpan, means for rotating said cam at a speedrslightly lower than that ofsaidshell and pan, and means for causing the engagement of said plowwith said latch to precede slightly the engagement of "said camprojection with said latch,-whereby in the operation of the producer,said plow is held stationary'to efi'ect ash removal, for relativelyshort periods, that alternate with longer periods, in each of which saidplow makes a full revolution.

Dated this 5th day of July, 1929.

SVEN LEOPOLD BENGT'SON.

the rotation of plow 13, allowing the latter Y to resume such rotationin unison with the pan 2 which, of course, discont nues the plowingaction; 'After the plow bar 28 has moved beyond latch 30, said latchagain drops down 7 into operative position, due to the passage of camportion 37 down beyond the roller 36,

but nevertheless, the plowing is not resumed i

